Abstract: Electromagnetic exploration methods are used to identify a subsurface anomalous feature. This is sometimes difficult in the presence of large fields from the transmitter or other surrounding material that may be above and around the subsurface feature. By constructing linear combinations of the field and gradients of the field it is possible to remove the large fields associated with the transmitter and the surrounding material to make identification of the anomalous subsurface material easier. The fields and gradients can also be combined so as to provide estimates of other electromagnetic field quantities that would be otherwise difficult to measure, for example the electric field or the time derivative of the electric field.

Abstract: A system and method for measuring ground penetrating radar data is described which includes controlling the timing for generating stimulus electromagnetic waves and the sampling rate of reflected electromagnetic waves in response to the stimulus electromagnetic waves. Generally, the timing is adjusted for spatially over-sampling the ground penetrating radar data. The speed of the system can also be adjusted based on the measured data.

Abstract: This patent embodies the concept of embedding a microprocessor or micro-controller, associated environment sensing transducers, and compensation elements, into every sensor or actuator element of a system which will allow monitoring of the conditions which affect the sensor performance and then provide a means of compensating for such effect.

Abstract: A multi-channel digital equivalent time sampling (MDETS) device having a programmable logic control that can select, delay or create various triggered signals. The MDETS can function independently or with multiple devices allowing for synchronized acquisition of data. The close proximity of MDETS device to a transmitter and receiver allows for the short time delay for acquiring the data.

Abstract: An improved multi transducer for a ground penetrating radar system (GPR) having a complete circuit for internal timing of signal emission, detection, digitalization and recording of data.

Abstract: A novel method of creating and detecting ultra wide bandwidth signals in a ground penetrating radar context.